Method of expressing long-chain prenyl diphosphate synthase

ABSTRACT

The present invention provides a method of producing a long-chain prenyl diphosphate synthase (in particular decaprenyl diphosphate synthase and solanesyl diphosphate synthase) using a gene and a protein which are required for enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase as well as a method of efficiently producing a coenzyme Q having a long-chain isoprenoid in its side chain (in particular coenzyme Q 9  or coenzyme Q 10 ) using a microorganism.  
     The present invention relates to a DNA having a base sequence shown under SEQ ID NO:1, 3 or 5 and a DNA sequence derived from the above base sequence by deletion, addition, insertion and/or substitution of one to several bases thereof, and coding for a protein enabling (functioning) or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism.

TECHNICAL FIELD

[0001] The present invention relates to a protein involved in the expression of a eukaryotes-derived long-chain prenyl diphosphate synthase, a gene coding for such enzyme, a vector containing such enzyme gene, a transformant resulting from transformation with such vector and a long-chain prenyl diphosphate synthase gene-containing expression vector as well as a method of producing a long-chain prenyl diphosphate synthase (in particular decaprenyl diphosphate synthase and solanesyl diphosphate synthase) and of a coenzyme Q having a long-chain isoprenoid in its side chain (in particular coenzyme Q₉ or coenzyme Q₁₀)

BACKGROUND ART

[0002] “Isoprenoids” is a generic name for a variety of compounds, including sterols, carotinoids and terpenes, among others. Among them, there is a group of prenyl diphosphate compounds containing a coenzyme Q side chain, and the synthesis thereof depends on the polymerization-like condensation reaction of isopentenyl diphosphate, which is an isoprene unit containing 5 carbon atoms, as catalyzed by a prenyl diphosphate synthase.

[0003] The respective prenyl diphosphate synthases are roughly classified into 4 groups.

[0004] The short chain (3 or 4 isoprene units) prenyl diphosphate synthases are known to perform their catalytic function in the form of homodimers. Examples of such are farnesyl diphosphate synthase (Eberthardt, N. L. (1975), J. Biol. Chem., 250, 863-866) and geranylgeranyl diphosphate synthase (Sagami, H. (1994), J. Biol. Chem., 269, 20561-20566).

[0005] The medium chain (6 or 7 isoprene units) prenyl diphosphate synthases are known to be heterodimeric enzymes composed of two proteins each independently having no catalytic activity. Examples are hexaprenyl diphosphate synthase (Fujii, H. (1982), J. Biol. Chem., 257, 14610), and heptaprenyl diphosphate synthase (Takahashi, I. (1980), J. Biol. Chem., 255, 4539).

[0006] Further, as for the long-chain (8 to 10 isoprene units) prenyl diphosphate synthases, it is reported that prokaryote-derived such enzymes are undissociable homodimers and are activated by a polyprenyl diphosphate carrier protein (Ohnuma, S. (1991), J. Biol. Chem., 266, 23706-23713). At present, however, there is no report available about eukaryotes-derived long-chain prenyl diphosphate synthases.

[0007] Coenzymes Q are composed of a quinone skeleton and an isoprenoid side chain and occur widely in a variety of living things, from microorganisms, such as bacteria and yeasts, to higher animals and plants. In prokaryotes, they occur in the plasma membrane and function as electron acceptors for cell membrane stabilization and for periplasmic membrane protein disulfide bond formation. In eukaryotes, they occur in the mitochondrial membrane and/or cytoplasmic membrane, and serve as essential factors in the electron transfer system in the mitochondrial respiratory chain and in the oxidative phosphorylation, function as antioxidants and contribute to the stabilization of biomembranes.

[0008] Coenzymes Q having an isoprenoid side chain resulting from condensation of 8 to 10 isoprene units, among others, have attracted attention as materials of health foods and the like. Among them, coenzyme Q₁₀ comprising 10 isoprene units is intrinsic in humans and is therefore very useful and is in use as a heart medicine.

[0009] Commercially, this coenzyme Q₁₀ is produced, for example, by isolating coenzymes Q from a plant, such as tobacco, and synthetically modifying the side chain length thereof.

[0010] It is also known that coenzyme Q₁₀ is produced by a wide variety of organisms, from microorganisms, such as bacteria and yeasts, to higher animals and plants, and the method comprising cultivating a microorganism and extracting this substance from cells thereof is thought to be one of the most efficient methods of production thereof and, actually, is in use in commercial production thereof. However, such methods cannot be said to be satisfactory in productivity since, for example, the yield is poor and/or the procedure is complicated.

[0011] Attempts have also been made to isolate genes involved in biosynthesis of coenzyme Q₁₀, amplify the genes by means of the recombinant DNA technology and utilizing them in increasing the production of coenzyme Q₁₀. In living organisms, coenzyme Q₁₀ is produced via a multistage complicated reaction process in which a number of enzymes are involved. The biosynthetic pathway therefor in prokaryotes differs in part from that in eukaryotes. Basically, however, the pathway comprises three main steps, namely the step of the synthesis of decaprenyl diphosphate to serve as the source of the decaprenyl side chain of coenzyme Q₁₀, the step of the synthesis of parahydroxybenzoic acid to serve as the source of the quinone ring, and the step of the coupling of these two compounds, followed by successive substituent conversion to complete coenzyme Q₁₀. Among the reactions involved, the reactions involved in decaprenyl diphosphate synthase, which are said to determine the rate of the whole biosynthetic reaction process and which determine the length of the side chain of coenzyme Q₁₀, are considered to be the most important reactions.

[0012] For efficient production of coenzyme Q₁₀, it is considered effective to isolate the decaprenyl diphosphate synthase gene, which is the key gene in the biosynthesis in question, and utilize the same for causing a production increase. Thus, so far, decaprenyl diphosphate synthase genes have been isolated from several microbial species, such as Schizosaccharomyces pombe (JP-A-09-173076) and Gluconobacter suboxydans (JP-A-10-57072) and studied for their use in coenzyme Q₁₀ production. As for the host microorganism for this coenzyme Q₁₀ production, it is desirable to use prokaryotes, such as Escherichia coli, from the viewpoint of productivity, safety, recombinant system preparation, and so on.

[0013] As for the decaprenyl diphosphate synthase gene sources, it is also possible to utilize eukaryotes in which coenzyme Q₁₀ is produced in relatively large amounts. Thus, for example, fungi are strong candidates. However, when a eukaryote-derived decaprenyl diphosphate synthase gene was introduced by recombination into those microorganisms which belong to the prokaryotes, for example Escherichia coli, coenzyme Q₁₀ was not produced or was produced only in unsatisfactory amounts. It is thought that this is due to an insufficient level of expression of the long-chain prenyl diphosphate synthase. Therefore, the development of a method of causing efficient expression, in prokaryotes, of a eukaryote-derived decaprenyl diphosphate synthase gene serving in relatively abundant coenzyme Qio production has been desired.

SUMMARY OF THE INVENTION

[0014] It is an object of the present invention to provide a protein involved in the expression of a eukaryotes-derived long-chain prenyl diphosphate synthase, a gene coding for such enzyme, a vector containing such enzyme gene, a transformant resulting from transformation with such vector and a long-chain prenyl diphosphate synthase gene-containing expression vector as well as a method of producing a long-chain prenyl diphosphate synthase (in particular decaprenyl diphosphate synthase and solanesyl diphosphate synthase) and of a coenzyme Q having a long-chain isoprenoid in its side chain (in particular coenzyme Q₉ or coenzyme Q₁₀).

[0015] Presupposing that, in the group of long-chain prenyl diphosphate synthase-biosynthesizing eukaryotes, there might be two forms of prenyl diphosphate synthase, the present inventors considered that when derived from the genus Saitoella or the like, the enzyme of which recombinant gene expression in Escherichia coli, a prokaryote, had been confirmed would be expressed in the homo form and that when derived from the genus Schizosaccharomyces or the like, the enzyme of which recombinant gene expression in Escherichia coli could not be confirmed would be expressed in the hetero form. Thus, they considered that there might be another gene involved in the expression of such a long-chain prenyl diphosphate synthase gene incapable of being expressed upon gene recombination and the long-chain prenyl diphosphate synthase gene would be expressed with the cooperation of the other gene and that, therefore, transformation of a prokaryotic host, such as Escherichia coli, with the long-chain prenyl diphosphate synthase gene alone could not result in satisfactory activity production.

[0016] Accordingly, they made investigations in an attempt to isolate a gene involved in the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase gene and succeeded in isolating genes enhancing the expression, in Escherichia coli, of the eukaryote-derived long-chain prenyl diphosphate synthase gene from a microorganism belonging to the genus Schizosaccharomyces and the higher animals mouse and human. Thus, they have now completed the present invention.

[0017] The present invention thus relates to a DNA defined below under (a), (b) or (c):

[0018] (a) a DNA having a base sequence shown under SEQ ID NO:1, 3 or 5 and coding for a protein enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism;

[0019] (b) a DNA having a base sequence derived from the base sequence shown under SEQ ID NO:1, 3 or 5 by deletion, addition, insertion and/or substitution of one to several bases thereof and coding for a protein enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism;

[0020] (c) a DNA capable of hybridizing with a DNA comprising the base sequence shown under SEQ ID NO:1, 3 or 5 under a stringent condition and coding for a protein enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism.

[0021] The invention also relates to a protein defined below under (d) or (e):

[0022] (d) a protein having an amino acid sequence shown under SEQ ID NO:2, 4 or 6 and enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism;

[0023] (e) a protein having an amino acid sequence derived from the amino acid sequence shown under SEQ ID NO:2, 4 or 6 by deletion, addition, insertion and/or substitution of one to several amino acid residues and enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism.

[0024] The invention further relates to a DNA coding for the protein defined above under (d) or (e).

[0025] Further, the invention relates to an expression vector resulting from insertion of the above DNA into a vector for expression; the expression vector as defined above wherein the vector for expression is pSTV28; the expression vector as defined above which is pSTVDLP1; the expression vector as defined above which is pSTVK28-mDLP1; and the expression vector as defined above which is pSTVK28-hDLP1.

[0026] Furthermore, the invention relates to a transformant resulting from transformation of a host microorganism with the above DNA; a transformant resulting from transformation of a host microorganism with the above expression vector; the transformant as defined above wherein the host microorganism is Escherichia coli; the transformant as defined above which is E. coli DH5α(pSTVDLP1) (FERM BP-7433); the transformant as defined above which is E. coli DH5α(pSTVK28-mDLP1); and the transformant as defined above which is E. coli DH5α(pSTVK28-hDLP1).

[0027] The invention further relates to the transformant as defined above which harbors a eukaryote-derived long-chain prenyl diphosphate synthase gene further introduced therein; the transformant as defined above wherein the eukaryote-derived prenyl diphosphate synthase gene is a gene derived from a microorganism belong to the genus Schizosaccharomyces, Saitoella, Rhodotorula, Leucosporidium, Asperugillus or Bulleomryces, a human-derived gene or a mouse-derived gene; the transformant as defined above which is E. coli DH5α(pSTVDLP1, PBSDPS) (FERM BP-7548); the transformant as defined above which is E. coli DH5α(pSTVDLP1, pUhDPS1) (FERM BP-8025); the transformant as defined above which is E. coli DH5α(pSTVDLP1, pBmSDS1); the transformant as defined above which is E. coli DH5α(pSTVK28-mDLP1, pUhDPS1); the transformant as defined above which is E. coli DH5α(pSTVK28-mDLP1, pBmSDS1) (FERM BP-8027); the transformant as defined above which is E. coli DH5α(pSTVK28-hDLP1, pUhDPS1) (FERM BP-8026); or the transformant as defined above which is E. coli DH5α(pSTVK28-hDLP1, pBmSDS1).

[0028] Still further, the invention relates to a method of producing coenzymes Q which comprises cultivating the transformant as defined above in a medium to cause formation and accumulation of a coenzyme Q in the culture and recovering the same.

DETAILED DISCLOSURE OF THE INVENTION

[0029] In the following, the present invention is described in detail.

[0030] The DNAs of the invention were isolated as follows.

[0031] Using the sequence of the decaprenyl diphosphate synthase gene of the genus Schizosaccharomyces, a homology search was conducted from a chromosomal database for the genus Schizosaccharomyces, and gene relatively high in homology was found out. Based on the above-mentioned gene sequence, genes relatively high in homology were also found out from chromosomal databases for the mouse and human, respectively.

[0032] For separating the thus-found gene from the chromosome of the genus Schizosaccharomyces, PCR primers, N-dlp1 (SEQ ID NO:7) and C-dlp1 (SEQ ID NO:8) were synthesized. For the separation from the human chromosome, hDLP1-N (SEQ ID NO: 9) and hDLP1-C (SEQ ID NO:10) were synthesized and, for the separation from the murine chromosome, mDLP1-N (SEQ ID NO:11) and mDLP1-C (SEQ ID NO:12) were synthesized.

[0033] Using these primers, the PCR conditions were studied and determined, and PCR was carried out by 2 minutes of heat treatment at 94° C. and 25 repetitions of the cycle one minute at 94° C.→one minute at 56° C.→two minutes at 72° C. That a DNA of about 900 bp was amplified from the chromosomal gene of Schizosaccharomyces pombe IFO 1628, a DNA about 1,200 bp from the human chromosome, and a DNA about 1,200 bp from the murine chromosome was revealed by analyzing the base sequences of the respective genes. The DNAs obtained were sequenced and found to have the base sequences shown in the sequence listing under SEQ ID NO:1, 3, and 5, respectively.

[0034] The DNA of the present invention, which is a DNA coding for a protein enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism, may be a DNA having the base sequence shown under SEQ ID NO:1, 3 or 5, or a DNA having abase sequence derived from the base sequence shown under SEQ ID NO:1, 3 or 5 by deletion, addition, insertion and/or substitution of one to several bases, or a DNA capable of hybridizing with the DNA comprising the base sequence shown under SEQ ID NO:l, 3 or 5 under a stringent condition.

[0035] Since a number of amino acids are encoded by one or more codons (genetic code degeneracy), not only the DNA comprising the base sequence shown under SEQ ID NO:1, 3 or 5 but also a number of other DNAs code for a protein comprising the amino acid sequence shown under SEQ ID NO:2, 4 or 6. Therefore, the DNA of the invention includes those DNAs coding for a protein comprising the amino acid sequence shown under SEQ ID NO:2, 4 or 6. The term “base sequence derived from a base sequence by deletion, addition, insertion and/or substitution of one to several bases” as used herein means a base sequence resulting from deletion, addition, insertion and/or substitution of such a number of bases as can be deleted, added, inserted and/or substituted by a method well known to those skilled in the art as described in Supplemental Issue, Tanpakushitsu, Kakusan, Koso (Protein, Nucleic Acid and Enzyme), PCR Method for Gene Amplification, TAKKAJ, 35 (17), 2951-3178 (1990) or Henry A. Erlich (ed.), translated into Japanese under the supervision of Ikunoshin Kato: PCR Technology (1990), for instance.

[0036] The term “DNA capable of hybridizing with a DNA comprising the base sequence shown under SEQ ID NO:1, 3 or 5 under a stringent condition” means a DNA obtained by the colony hybridization, plaque hybridization or Southern hybridization technique, among others, using, as a probe, the DNA comprising the base sequence shown under SEQ ID NO:1, 3 or 5. Those skilled in the art can easily obtain any desired DNA by conducting such hybridization according to the method described in Molecular Cloning, 2nd Edt. (Cold Spring Harbor Laboratory Press, 1989). For example, the desired DNA can be obtained by carrying out the hybridization at a temperature of not lower than 50° C. in urea-free SSC having a salt concentration of not higher than 0.5 M.

[0037] Further, the term “protein enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism” indicates a protein that increases the coenzyme Q production in the host microorganism by causing a eukaryote-derived long-chain prenyl diphosphate synthase gene to be expressed in the host microorganism harboring the gene as introduced therein and thus enabling or enhancing the expression of the long-chain prenyl diphosphate synthase activity.

[0038] Whether a protein is such a protein or not can be checked by preparing a transformant resulting from transformation with the long-chain prenyl diphosphate synthase gene alone and a transformant resulting from transformation with the long-chain prenyl diphosphate synthase gene together with a DNA coding for the protein in question and measuring and comparing the coenzyme Q productions in both transformants under the same conditions. In other words, when the coenzyme Q production is absolutely zero or little in the transformant resulting from transformation with the long-chain prenyl diphosphate synthase gene alone but the coenzyme Q production is significant in the transformant resulting from transformation with the long-chain prenyl diphosphate synthase gene together with the DNA coding for the protein in question, the protein corresponds to the one defined hereinabove.

[0039] The protein of the invention, which is a protein enabling or enhancing (potentiating) the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism, may be a protein having the amino acid sequence shown under SEQ ID NO:2, 4, or 6, or a protein having an amino acid sequence derived from the amino acid sequence shown under SEQ ID NO:2, 4 or 6 by deletion, addition, insertion and/or substitution of one to several amino acid residues.

[0040] The “amino acid sequence derived by deletion, addition, insertion and/or substitution of one to several amino acid residues” so referred to herein can be obtained by deleting, adding, inserting and/or substituting such a number of amino acid residues as can be deleted, added, inserted and/or substituted by a method well known to those skilled in the art, for example by the technique of site-specific mutagenesis. Such method is more specifically described in the literature, for example Nucleic Acids Res., 10, 6487 (1982), and Methods in Enzymology, 100, 448 (1983).

[0041] For causing the protein of the invention to be expressed, it is necessary to join the gene for the protein to the downstream of an appropriate promoter. For example, an expression vector can be prepared by excising a DNA fragment containing the gene with restriction enzyme treatment, or amplifying, by PCR, the enzyme-encoding gene segment alone, and inserting this into a promoter-containing vector for expression.

[0042] The expression vector of the invention comprises a vector for expression with the above-mentioned DNA inserted therein.

[0043] The vector for expression is not particularly restricted but may be, for example, one resulting from insertion of an appropriate promoter into an Escherichia coli-derived plasmid. As the Escherichia coli-derived plasmid, there may be mentioned, for example, pSTV28, pBR322, pBR325, pUC19, and pUC119. As the promoter, there may be mentioned, for example, the T7 promoter, trp promoter, tac promoter, lac promoter, and APL promoter.

[0044] In the practice of the invention, pGEX-2T, pGEX-3T, pGEX-3X (the three being products of Pharmacia), pBluescript II, pUC19 (product of Toyobo), pMALC2, pET-3T, pUCNT (described in WO 94/03613) and the like may also be used as the vector for expression.

[0045] Among them, pSTV28 is suitably used. In specific examples, an expression vector designated as pSTVDLP1 can be constructed by inserting a DNA comprising the base sequence shown under SEQ ID NO:1 into the vector pSTV28 for expression, an expression vector designated as pSTVK28-hDLP1 by inserting a DNA comprising the base sequence shown under SE ID NO:3 into pSTV28, and an expression vector designated as pSTVK28-mDLP1 by inserting a DNA comprising the base sequence shown under SEQ ID NO:5 into pSTV28.

[0046] The transformant of the invention may be one resulting from transformation of a host microorganism with the DNA mentioned above, or one resulting from transformation of a host microorganism with the expression vector mentioned above, or one resulting from transformation of a host microorganism with the above-mentioned DNA or expression vector together with a eukaryote-derived long-chain prenyl diphosphate synthase gene used additionally.

[0047] By introducing the above expression vector, together with an expression vector containing a eukaryote-derived long-chain prenyl diphosphate synthase gene, into an appropriate host microorganism, it becomes possible to utilize the resulting transformant in coenzyme Q production.

[0048] The eukaryote to serve as the long-chain prenyl diphosphate synthase gene source is not particularly restricted but includes, among others, decaprenyl diphosphate synthase-producing microorganisms belonging to the genera Schizosaccharomyces, Saitoella, Rhodotorula, Leucosporidium, Asperugillus, Bulleomyces and the like, human beings, and solanesyl diphosphate synthase-producing mice.

[0049] The host microorganism is not particularly restricted. Escherichia coli and the like are suitably used, however. The species of Escherichia coli is not particularly restricted but includes XL1-Blue, BL-21, JM109, NM522, DH5α, HB101, and DH5, among others. Among them, Escherichia coli DH5α is suitably used.

[0050] When, for example, the above-mentioned expression vector pSTVDLP1 is introduced, together with an expression vector for the decaprenyl diphosphate synthase gene derived from the genus Schizosaccharomyces, into Escherichia coli, the microorganism can be converted into a transformant capable of producing significant amounts of coenzyme Q₁₀ which originally cannot be produced in Escherichia coli.

[0051] The transformant of the invention includes, among others, the following:

[0052] The E. coli strain DH5α(pSTVDLP1) resulting from transformation with pSTVDLP1;

[0053] The E. coli strain DH5α(pSTVK28-mDLP1) resulting from transformation with pSTVK28-mDLP1;

[0054] The E. coli strain DH5α(pSTVK28-hDLP1) resulting from transformation with pSTVK28-hDLP1;

[0055] The E. coli strain DH5α(pSTVDLP1, pBSDPS) resulting from transformation with pSTVDLP1 and pBSDPS;

[0056] The E. coli strain DH5α(pSTVDLP1, pUhDPS1) resulting from transformation with pSTVDLP1 and pUhDPS1;

[0057] The E. coli strain DH5α(pSTVDLP1, pBmSDS1) resulting from transformation with pSTVDLP1 and pBmSDS1;

[0058] The E. coli strain DH5α(pSTVK28-mDLP1, pUhDPS1) resulting from transformation with pSTVK28-mDLP1 and pUhDPS1;

[0059] The E. coli strain DH5α(pSTVK28-mDLP1, pBmSDS1) resulting from transformation with pSTVK28-mDLP1 and pBmSDS1;

[0060] The E. coli strain DH5α(pSTVK28-hDLP1, pUhDPS1) resulting from transformation with pSTVK28-hDLP1 and pUhDPS1; and

[0061] The E. coli strain DH5α(pSTVK28-hDLP1, pBmSDS1) resulting from transformation with pSTVK28-hDLP1 and pBmSDS1.

[0062] Among them, E. coli DH5α(pSTVDLP1) has been deposited with the National Institute of Advanced Industrial Science and Technology International Patent Organism Depositary, Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki, Japan as of Jan. 18, 2001 under the accession number FERM BP-7433,

[0063]E. coli DH5α(pSTVDLP1, pBSDPS) as of Apr. 17, 2001 under the accession number FERM BP-7548,

[0064]E. coli DH5(pSTVDLP1, pUhDPS1) as of Apr. 19, 2002 under the accession number FERM BP-8025,

[0065]E. coli DH5α(pSTVK28-mDLP1, pBmSDS1) as of Apr. 19, 2002 under the accession number FERM BP-8027, and

[0066]E. coli DH5α(pSTVK28-hDLP1, pUhDPS1) as of Apr. 19, 2002 under the accession number FERM BP-8026.

[0067] By using the DNA of the invention combinedly with a eukaryote-derived long-chain prenyl diphosphate synthase gene expression vector and, in addition, introducing another gene involved in the biosynthesis of a coenzyme Q simultaneously into the microorganism employed, it becomes possible to expect a still better result.

[0068] As the other gene, there may be mentioned, for example, the polyprenyl diphosphate transferase gene and the like.

[0069] A coenzyme Q can be produced in the conventional manner by cultivating the transformant obtained in accordance with the invention in a medium and recovering the coenzyme Q form the culture.

[0070] In cases where the host microorganism is Escherichia coli, LB medium, M9 medium containing glucose and/or casamino acids, and the like can be used as the medium. For efficient promoter functioning, such an agent as isopropylthiogalactoside and/or indolyl-3-acrylic acid, for instance, maybe added to the medium. The cultivation is carried out, for example, at 20 to 40° C., preferably at 30 to 37° C., more preferably at 37° C., for 17 to 24 hours and, on that occasion, aeration, agitation and the like may be made according to need.

[0071] In the practice of the invention, the coenzyme Q obtained may be optionally purified or used in the form of a roughly purified product according to the intended use thereof.

[0072] For coenzyme Q purification from the culture obtained, an appropriate combination of separation/purification methods known in the art can be used. As the separation/purification methods known in the art, there may be mentioned the methods utilizing the difference in electric charge, such as ion exchange chromatography, the methods utilizing the difference in specific affinity, such as affinity chromatography, and the methods utilizing the difference in hydrophobicity, such as reversed phase high-performance liquid chromatography, among others.

[0073] The use of the coenzyme Q obtained in accordance with the invention is not particularly restricted but the coenzyme Q can be suitably used in drugs, foods and so forth.

BRIEF DESCRIPTION OF THE DRAWINGS

[0074]FIG. 1 is arestriction enzyme map of the expression vector pSTVDLP1.

[0075]FIG. 2 is a restriction enzyme map of the expression vector pSTVK28-hDLP1.

[0076]FIG. 3 is arestriction enzyme map of the expression vector pSTVK28-mDLP1.

[0077]FIG. 4 to FIG. 8 show HPLC analysis charts for the products formed by a host and transformants thereof.

BEST MODES FOR CARRYING OUT THE INVENTION

[0078] The following examples illustrate the present invention in further detail. These examples are, however, by no means limitative of the scope of the invention.

EXAMPLE 1

[0079] Using the base sequence of the decaprenyl diphosphate synthase gene of Schizosaccharomyces pombe, homology search was conducted in the Sanger Center database and, as a result, a gene having 26% homology was found out by means of GENETYX (Software Development Co., Ltd.). PCR primers, N-dlp1 (SEQ ID NO:7) and C-dlp1 (SEQ ID NO:8), were prepared for obtaining that gene. Separately, the chromosomal DNA of Schizosaccharomyces pombe IFO 1628 was prepared by the method of C. S. Hoffman et al. (Gene, 57 (1987), 267-272). Using these, PCR was carried out by 2 minutes of heat treatment at 94° C. followed by 25 repetitions of the following cycle: one minute at 94° C.→one minute at 56° C. →two minutes at 72° C. The thus-amplified DNA was analyzed by 0.7% agarose gel electrophoresis.

[0080] The thus-obtained fragment of about 900 bp was excised from the gel, purified using a DNA extraction kit (Sephaglas (trademark) BandPrep Kit, product of Amersham Pharmacia Biotech) and then cloned in a vector for expression in Escherichia coli using a PCR product direct cloning kit (pT7BlueT-Vector Kit, product of NOVAGEN) to give pT7-DLP1. The DNA base sequence was determined using a DNA sequencer (model 377, product of Perkin Elmer) and a DNA sequencing kit (product of Perkin Elmer, ABI PRISM (trademark) BigDye (trademark) Terminator Cycle Sequence Ready Reaction Kit with AmpliTaq (registered trademark) DNA polymerase, FS) and conducting the reactions according to the manual attached to the kit. As a result, the full-length sequence occurring on the database could be obtained.

[0081] pT7-DLP1 was cleaved with the restriction enzymes EcoRI and EcoRV (products of Takara Shuzo), followed by 0.8% agarose gel electrophoresis. The fragment of about 900 bp was excised from the gel and purified using a DNA extraction kit (Sephaglas (trademark) BandPrep Kit, product of Amersham Pharmacia Biotech), and this DNA fragment was then inserted into pSTV28 (product of Takara Shuzo) at the EcoRI-SmaI site. The DNA base sequence was determined using a DNA sequencer (model 377, product of Perkin Elmer) and a DNA sequencing kit (product of Perkin Elmer, ABI PRISM (trademark) BigDye (trademark) Terminator Cycle Sequence Ready Reaction Kit with AmpliTaq (registered trademark) DNA polymerase, FS) and conducting the reactions according to the manual attached to the kit. As a result, an expression vector, pSTVDLP1, could be obtained. A restriction enzyme map of the expression vector pSTVDLP1 is shown in FIG. 1.

[0082] The E. coli DH5α(pSTVDLP1) strain obtained by transformation with the above-obtained pSTVDLP1 has been deposited with the National Institute of Advanced Industrial Science and Technology International Patent Organism Depositary, Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki, Japan as of Jan. 18, 2001 under the accession number FERM BP-7433.

EXAMPLE 2

[0083] Using the base sequence of the DLP1 gene of Schizosaccharomyces pombe as obtained in Example 1, homology search was conducted in a Genbank database and, as a result, a gene having 27% homology was found out by means of GENETYX (Software Development Co., Ltd.). PCR primers, hDLP1-N (SEQ ID NO:9) and hDLP1-C (SEQ ID NO:10), were prepared for obtaining that gene. Using a human liver cDNA library (cDNA Library, Human Liver, plasmid type (product of Takara Shuzo)) as a template, PCR was carried out by 2 minutes of heat treatment at 94° C. followed by 35 repetitions of the following cycle: one minute at 94° C.→one minute at 56° C.→two minutes at 72° C. The thus-amplified DNA was analyzed by 0.7% agarose gel electrophoresis.

[0084] The thus-obtained fragment of about 1,200 bp was excised from the gel, purified using a DNA extraction kit (Sephaglas (trademark) BandPrep Kit, product of Amersham Pharmacia Biotech) and then cloned in a vector for expression in Escherichia coli using a PCR product direct cloning kit (pT7BlueT-Vector Kit, product of NOVAGEN) to give pT7-hDLP1. The DNA base sequence was determined using a DNA sequencer (model 377, product of Perkin Elmer) and a DNA sequencing kit (product of Perkin Elmer, ABI PRISM (trademark) BigDye (trademark) Terminator Cycle Sequence Ready Reaction Kit with AmpliTaq (registered trademark) DNA polymerase, FS) and conducting the reactions according to the manual attached to the kit. As a result, the full-length sequence occurring on the database could be obtained.

[0085] pT7-hDLP1 was cleaved with the restriction enzymes BamHI and HindIII (products of Takara Shuzo), followedby 0.8% agarose gel electrophoresis. The fragment of about 1,200 bp was excised from the gel and purified using a DNA extraction kit (Sephaglas (trademark) BandPrep Kit, product of Amersham Pharmacia Biotech), and this DNA fragment was then inserted into pSTV28 (product of Takara Shuzo) at the BamHI-HindIII site. The DNA base sequence was determined using a DNA sequencer (model 377, product of Perkin Elmer) and a DNA sequencing kit (product of Perkin Elmer, ABI PRISM (trademark) BigDye (trademark) Terminator Cycle Sequence Ready Reaction Kit with AmpliTaq (registered trademark) DNA polymerase, FS) and conducting the reactions according to the manual attached to the kit. As a result, an expression vector, pSTVK28-hDLP1, could be obtained. A restriction enzyme map of the expression vector pSTVK28-hDLP1 is shown in FIG. 2. An Escherichia coli strain, DH5α(pSTVK28-hDLP1), was obtained by transformation with pSTVK28-hDLP1.

EXAMPLE 3

[0086] Using the base sequence of the DLP1 gene of Schizosaccharomyces pombe as obtained in Example 1, homology search was conducted in a Genbank database and, as a result, a gene having 31% homology was found out by means of GENETYX (Software Development Co., Ltd.). PCR primers, mDLP1-N (SEQ ID NO:11) and mDLP1-C (SEQ ID NO:12), were prepared for obtaining that gene. Using a murine liver cDNA library (cDNA Library, Mouse Liver, plasmid type (product of Takara Shuzo)) as a template, PCR was carried out by 2 minutes of heat treatment at 94° C. followed by 35 repetitions of the following cycle: one minute at 94° C.→one minute at 56° C.→two minutes at 72° C. The thus-amplified DNA was analyzed by 0.7% agarose gel electrophoresis.

[0087] The thus-obtained fragment of about 1,200 bp was excised from the gel, purified using a DNA extraction kit (Sephaglas (trademark) BandPrep Kit, product of Amersham Pharmacia Biotech) and then cloned in a vector for expression in Escherichia coli using a PCR product direct cloning kit (pT7BlueT-Vector Kit, product of NOVAGEN) to give pT7-mDLP1. The DNA base sequence was determined using a DNA sequencer (model 377, product of Perkin Elmer) and a DNA sequencing kit (product of Perkin Elmer, ABI PRISM (trademark) BigDye (trademark) Terminator Cycle Sequence Ready Reaction Kit with AmpliTaq (registered trademark) DNA polymerase, FS) and conducting the reactions according to the manual attached to the kit. As a result, the full-length sequence occurring on the database could be obtained.

[0088] pT7-mDLP1 was cleaved with the restriction enzymes EcoRI and BamHI (products of Takara Shuzo), followed by 0.8% agarose gel electrophoresis. The fragment of about 1,200 bp was excised from the gel and purified using a DNA extraction kit (Sephaglas (trademark) BandPrep Kit, product of Amersham Pharmacia Biotech), and this DNA fragment was then inserted into pSTV28 (product of Takara Shuzo) at the EcoRI-BamHI site. The DNA base sequence was determined using a DNA sequencer (model 377, product of Perkin Elmer) and a DNA sequencing kit (product of Perkin Elmer, ABI PRISM (trademark) BigDye (trademark) Terminator Cycle Sequence Ready Reaction Kit with AmpliTaq (registered trademark) DNA polymerase, FS) and conducting the reactions according to the manual attached to the kit. As a result, an expression vector, pSTVK28-mDLP1, could be obtained. Arestriction enzyme map of the expression vector pSTVK28-mDLP1 is shown in FIG. 3. An Escherichia coli strain, DH5α(pSTVK28-mDLP1), was obtained by transformation with pSTVK28-mDLP1.

EXAMPLE 4

[0089] Using pKS18 (Suzuki, K., J. Biochem., 121, 496-505 (1997)) having a Schizosaccharomyces pombe cDNA-derived decaprenyl diphosphate synthase gene and primers, N-dps (SEQ ID NO:13) and C-dps (SEQ ID NO:14), PCR was carried out by 2 minutes of heat treatment at 94° C. followed by 25 repetitions of the following cycle: one minute at 94° C.→one minute at 56° C. →two minutes at 72° C. The thus-amplified DNA was analyzed by 0.7% agarose gel electrophoresis.

[0090] The thus-obtained fragment of about 1,100 bp was excised from the gel, purified using a DNA extraction kit (Sephaglas (trademark) BandPrep Kit, product of Amersham Pharmacia Biotech) and then inserted into the vector pBluescript II for expression in Escherichia coli at the SalI-PstI site to give an expression vector, pBSDPS. Escherichia coli DH5α was transformed with this vector to give E. coli DH5α(pBSDPS).

[0091] This transformant was further transformed with pSTVDLP1, followed by screening using 30 μ/ml chloramphenicol and 50 μg/ml ampicillin, whereby E. coli DH5α(pSTVDLP1, pBSDPS) harboring both of the vectors was obtained.

EXAMPLE 5

[0092] Using the base sequence of the human decaprenyl diphosphate synthase gene appearing on a Genbank database, PCR primers, hDPS1-N (SEQ ID NO:15) and hDPS1-C (SEQ ID NO:16), were prepared. Using a human liver cDNA library (cDNA Library, Human Liver, plasmid type (product of Takara Shuzo)) as a template, PCR was carried out by 2 minutes of heat treatment at 94° C. followed by 35 repetitions of the following cycle: one minute at 94° C.→one minute at 56° C.→two minutes at 72° C. The thus-amplified DNA was analyzed by 0.7% agarose gel electrophoresis.

[0093] The thus-obtained fragment of about 1,250 bp was excised from the gel, purified using a DNA extraction kit (Sephaglas (trademark) BandPrep Kit, product of Amersham Pharmacia Biotech) and then cloned in a vector for expression in Escherichia coli using a PCR product direct cloning kit (pT7BlueT-Vector Kit, product of NOVAGEN) to give pT7-hDPS1. The DNA base sequence was determined using a DNA sequencer (model 377, product of Perkin Elmer) and a DNA sequencing kit (product of Perkin Elmer, ABI PRISM (trademark) BigDye (trademark) Terminator Cycle Sequence Ready Reaction Kit with AmpliTaq (registered trademark) DNA polymerase, FS) and conducting the reactions according to the manual attached to the kit. As a result, the full-length sequence occurring on the database could be obtained.

[0094] pT7-hDPS1 was cleaved with the restriction enzymes SalI and BamHI (products of Takara Shuzo), followed by 0.8% agarose gel electrophoresis. The fragment of about 1,250 bp was excised from the gel and purified using a DNA extraction kit (Sephaglas (trademark) BandPrep Kit, product of Amersham Pharmacia Biotech), and this DNA fragment was then inserted into pUC119 (product of Takara Shuzo) at the SalI-BamHI site. The DNA base sequence was determined using a DNA sequencer (model 377, product of Perkin Elmer) and a DNA sequencing kit (product of Perkin Elmer, ABI PRISM (trademark) BigDye (trademark) Terminator Cycle Sequence Ready Reaction Kit with AmpliTaq (registered trademark) DNA polymerase, FS) and conducting the reactions according to the manual attached to the kit. As a result, an expression vector, pUhDPS1, could be obtained. Escherichia coli DH5α was transformed with this vector to give E. coli DH5α(pUhDPS1).

EXAMPLE 6

[0095] Using the base sequence of the murine solanesyl diphosphate synthase gene appearing on a Genbank database, PCR primers, mSDS-N (SEQ ID NO:17) and mSDS-C (SEQ ID NO:18), were prepared. Using a murine liver cDNA library (CDNA Library, Mouse Liver, plasmid type (product of Takara Shuzo)) as a template, PCR was carried out by 2 minutes of heat treatment at 94° C. followed by 35 repetitions of the following cycle: one minute at 94° C.→one minute at 56° C.→two minutes at 72° C. The thus-amplified DNA was analyzed by 0.7% agarose gel electrophoresis.

[0096] The thus-obtained fragment of about 1,230 bp was excised from the gel, purified using a DNA extraction kit (Sephaglas (trademark) BandPrep Kit, product of Amersham Pharmacia Biotech) and then cloned in a vector for expression in Escherichia coli using a PCR product direct cloning kit (pT7BlueT-Vector Kit, product of NOVAGEN) to give pT7-mSDS. The DNA base sequence was determined using a DNA sequencer (model 377, product of Perkin Elmer) and a DNA sequencing kit (product of Perkin Elmer, ABI PRISM (trademark) BigDye (trademark) Terminator Cycle Sequence Ready Reaction Kit with AmpliTaq (registered trademark) DNA polymerase, FS) and conducting the reactions according to the manual attached to the kit. As a result, the full-length sequence occurring on the database could be obtained.

[0097] pT7-mSDS was cleaved with the restriction enzymes EcoRI and SalI (products of Takara Shuzo), followed by 0.8% agarose gel electrophoresis. The fragment of about 1,230 bp was excised from the gel and purified using a DNA extraction kit (Sephaglas (trademark) BandPrep Kit, product of Amersham Pharmacia Biotech), and this DNA fragment was then inserted into pBluescript II SK (+) (product of Toyobo) at the EcoRI-SalI site. The DNA base sequence was determined using a DNA sequencer (model 377, product of Perkin Elmer) and a DNA sequencing kit (product of Perkin Elmer, ABI PRISM (trademark) BigDye (trademark) Terminator Cycle Sequence Ready Reaction Kit with AmpliTaq (registered trademark) DNA polymerase, FS) and conducting the reactions according to the manual attached to the kit. As a result, an expression vector, pBmSDS1, could be obtained. Escherichia coli DH5α was transformed with this vector to give E. coli DH5α(pBmSDS1l).

EXAMPLE 7

[0098] The transformants E. coli DH5α(pBSDPS), E. coli DH5α(pUhDPS1), and E. coli DH5α(pBmSDS1) resulting from transformation with the long-chain prenyl diphosphate synthase expression vectors constructed in Examples 4 to 6 were further transformed in various combinations with the expression vectors for activity elevatory protein expression as constructed in Examples 1 to 3.

[0099] For example, the transformant E. coli DH5α(pBSDPS) was further transformed with pSTVDLP1, as described in Example 4, to give the transformant E. coli DH5α(pSTVDLP1, pBSDPS) harboring both of the vectors. The following transformants were further obtained in the same manner:

[0100] The strain E. coli DH5α(pSTVDLP1, pUhDPS1) resulting from transformation with pSTVDLP1 and pUhDPS1;

[0101] The strain E. coli DH5α(pSTVDLP1, pBmSDS1) resulting from transformation with pSTVDLP1 and pBmSDS1;

[0102] The strain E. coli DH5α(pSTVK28-mDLP1, pUhDPS1) resulting from transformation with pSTVK28-mDLP1 and pUhDPS1;

[0103] The strain E. coli DH5α(pSTVK28-mDLP1, pBmSDS1) resulting from transformation with pSTVK28-mDLP1 and pBmSDS1;

[0104] The strain E. coli DH5α(pSTVK28-hDLP1, pUhDPS1) resulting from transformation with pSTVK28-hDLP1 and pUhDPS1; and

[0105] The strain E. coli DH5α(pSTVK28-hDLP1, pBmSDS1) resulting from transformation with pSTVK28-hDLP1 and pBmSDS1.

[0106] Among them, E. coli DH5α(pSTVDLP1, pBSDPS) has been deposited with the National Institute of Advanced Industrial Science and Technology International Patent Organism Depositary, Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki, Japan as of Apr. 17, 2001 under the accession number FERM BP-7548,

[0107]E. coli DH5α(pSTVDLP1, pUhDPS1) as of Apr. 19, 2002 under the accession number FERM BP-8025,

[0108]E. coli DH5α(pSTVK28-mDLP1, pBmSDS1) as of Apr. 19, 2002 under the accession number FERM BP-8027, and

[0109]E. coli DH5α(pSTVK28-hDLP1, pUhDPS1) as of April 19, 2002 under the accession number FERM BP-8026.

EXAMPLE 8

[0110] The transformants E. coli DH5α(pBSDPS), E. coli DH5α(pUhDPS1) and E. coli DH5α(pBmSDS1) obtained in the above examples were each shake-cultured overnight at 37° C. in 200 ml of LB medium containing 50 μg/ml ampicillin,

[0111]E. coli DH5α(pSTVDLP1) in 200 ml of LB medium containing 30 μg/ml chloramphenicol,

[0112]E. coli DH5α(pSTVK28-hDLP1) and E. coli DH5α(pSTVK28-mDLP1) each in 200 ml of LB medium containing 50 μg/ml kanamycin,

[0113]E. coli DH5α(pSTVDLP1, PBSDPS), E. coli DH5α(pSTVDLP1, pUhDPS1) and E. coli DH5α(pSTVDLP1, pBmSDS1) each in 200 ml of LB medium containing 30 μg/ml chloramphenicol and 50 μg/ml ampicillin,

[0114]E. coli DH5α(pSTVK28-hDLP1, pUhDPS1), E. coli DH5α(pSTVK28-hDLP1, pBmSDS1), E. coli DH5α(pSTVK28-mDLP1, pUhDPS1) and E. coli DH5α(pSTVK28-mDLP1, pBmSDS1) each in 200 ml of LB medium containing 50 μg/ml kanamycin and 50 μg/ml ampicillin. Bacterial cells were harvested by centrifugation (3,000 rpm, 20 minutes).

[0115] Acetone-methanol (7:2) (3 ml) was added to these cells, and extraction was effected by 6 repetitions of 30 seconds of sonication and the subsequent 30 seconds of standing on ice. Centrifugation (3,000 rpm, 5 minutes) gave an extract. This extract was vacuum-dried, 1 ml of chloroform-methanol (1:1) and an equal amount of a 0.7% aqueous solution of sodium chloride were added to the dried product, and the mixture was stirred well for attaining dissolution and then centrifuged at 14,000 rpm for 1 minute. The lower layer was extracted and dried, and the residue was dissolved in 50 μl of chloroform-methanol (2:1). This sample was spotted on a TLC plate, and developed with 100% benzene. The silica gel portion at approximately the same position as the spot obtained by development of coenzyme Q₁₀ as a standard was scraped off and extracted with 400 μl of chloroform-methanol (1:1). A20-μl portion of this extract was analyzed by high-performance liquid chromatography (LC-10 A, product of Shimadzu). For the separation, a reversed phase column (YMC-pack ODS-A, 250×4.6 mm, S-5 μm, 120 A) was used, separation was effected using 100% ethanol as a mobile phase solvent, and the products coenzyme Q₉ and Q₁₀ were detected based on the absorbance at the wavelength 275 nm. The results are shown in FIGS. 4 to 8. As shown in FIGS. 4 to 8, it was revealed that the introduction of each DLP1 gene together with the prenyl diphosphate synthase gene and the subsequent expression thereof resulted in the production of coenzyme Q₉ and/or Q₁₀, which cannot be expressed in those Escherichia coli strains resulting from transformation with the prenyl diphosphate synthase gene alone.

Industrial Applicability

[0116] The invention provides a protein involved in the expression of a eukaryotes-derived long-chain prenyl diphosphate synthase, a gene coding for such enzyme, a vector containing such enzyme gene, a transformant resulting from transformation with such vector and a long-chain prenyl diphosphate synthase gene-containing expression vector as well as a method of producing a long-chain prenyl diphosphate synthase (in particular decaprenyl diphosphate synthase and solanesyl diphosphate synthase) and of a coenzyme Q having a long-chain isoprenoid in its side chain (in particular coenzyme Q₉ or coenzyme Q₁₀) . According to the invention, it is possible to produce eukaryote-derived enzymes as well as coenzyme Q₉, coenzyme Q₁₀ and the like.

1 18 1 885 DNA Schizosaccharomyces pombe 1 atg agc ttt ccg ttc gct agt ttg ctg aaa agg cct tct gca ata agc 48 Met Ser Phe Pro Phe Ala Ser Leu Leu Lys Arg Pro Ser Ala Ile Ser 1 5 10 15 tct cta tta tct tta aaa aaa cct ggt tcc tgg tct tcc att ctg cta 96 Ser Leu Leu Ser Leu Lys Lys Pro Gly Ser Trp Ser Ser Ile Leu Leu 20 25 30 aaa gct gta ggg gtt tta tca cga gat tcc cgt tgg cat tct gac tta 144 Lys Ala Val Gly Val Leu Ser Arg Asp Ser Arg Trp His Ser Asp Leu 35 40 45 tta aaa atg ctt aca gaa gaa atg gat tct tta aat ggt caa att aat 192 Leu Lys Met Leu Thr Glu Glu Met Asp Ser Leu Asn Gly Gln Ile Asn 50 55 60 acg tgg aca gat aat aat cct tta tta gat gaa att acg aag cca tac 240 Thr Trp Thr Asp Asn Asn Pro Leu Leu Asp Glu Ile Thr Lys Pro Tyr 65 70 75 80 aga aaa tct tca act cgt ttt ttt cat ccg ctt ctt gta ctt cta atg 288 Arg Lys Ser Ser Thr Arg Phe Phe His Pro Leu Leu Val Leu Leu Met 85 90 95 tct aga gca tca gta aat ggg gat cca ccg agt cag caa cta ttt caa 336 Ser Arg Ala Ser Val Asn Gly Asp Pro Pro Ser Gln Gln Leu Phe Gln 100 105 110 agg tac aaa caa ctt gcc cgt gta aca gaa ttg att cat gct gcc aat 384 Arg Tyr Lys Gln Leu Ala Arg Val Thr Glu Leu Ile His Ala Ala Asn 115 120 125 ata att cat att aat att gga gaa gaa caa agc aac gaa cag att aaa 432 Ile Ile His Ile Asn Ile Gly Glu Glu Gln Ser Asn Glu Gln Ile Lys 130 135 140 ctt gca acg ttg gtt gga gat tat tta ctc gga aag gcg tct gtt gat 480 Leu Ala Thr Leu Val Gly Asp Tyr Leu Leu Gly Lys Ala Ser Val Asp 145 150 155 160 tta gca cat tta gaa aac aac gct att aca gaa att atg gct tct gtt 528 Leu Ala His Leu Glu Asn Asn Ala Ile Thr Glu Ile Met Ala Ser Val 165 170 175 att gca aac tta gtt gaa ggg cac ttc gga agc cga caa aat ggc tct 576 Ile Ala Asn Leu Val Glu Gly His Phe Gly Ser Arg Gln Asn Gly Ser 180 185 190 gtt ggt ttg tca aac gaa cga acc atc ctt ctg caa tca gcc ttt atg 624 Val Gly Leu Ser Asn Glu Arg Thr Ile Leu Leu Gln Ser Ala Phe Met 195 200 205 cca gca aag gca tgt tta tgc gca agc ata ttg aat aac tca tca caa 672 Pro Ala Lys Ala Cys Leu Cys Ala Ser Ile Leu Asn Asn Ser Ser Gln 210 215 220 tac att aat gat gcg tgt ttc aat tat gga aaa ttt cta ggc tta tcg 720 Tyr Ile Asn Asp Ala Cys Phe Asn Tyr Gly Lys Phe Leu Gly Leu Ser 225 230 235 240 ctg caa ctg gcc cat aag cct gta tct cct gac gcc caa gtt ttg caa 768 Leu Gln Leu Ala His Lys Pro Val Ser Pro Asp Ala Gln Val Leu Gln 245 250 255 aag aat aat gac att ttg aaa aca tat gtt gag aat gcc aag agc tca 816 Lys Asn Asn Asp Ile Leu Lys Thr Tyr Val Glu Asn Ala Lys Ser Ser 260 265 270 ttg tct gtt ttc ccc gat ata gag gct aag caa gct ctc atg gaa atc 864 Leu Ser Val Phe Pro Asp Ile Glu Ala Lys Gln Ala Leu Met Glu Ile 275 280 285 gct aat agt gtt tcg aag taa 885 Ala Asn Ser Val Ser Lys 290 2 294 PRT Schizosaccharomyces pombe 2 Met Ser Phe Pro Phe Ala Ser Leu Leu Lys Arg Pro Ser Ala Ile Ser 1 5 10 15 Ser Leu Leu Ser Leu Lys Lys Pro Gly Ser Trp Ser Ser Ile Leu Leu 20 25 30 Lys Ala Val Gly Val Leu Ser Arg Asp Ser Arg Trp His Ser Asp Leu 35 40 45 Leu Lys Met Leu Thr Glu Glu Met Asp Ser Leu Asn Gly Gln Ile Asn 50 55 60 Thr Trp Thr Asp Asn Asn Pro Leu Leu Asp Glu Ile Thr Lys Pro Tyr 65 70 75 80 Arg Lys Ser Ser Thr Arg Phe Phe His Pro Leu Leu Val Leu Leu Met 85 90 95 Ser Arg Ala Ser Val Asn Gly Asp Pro Pro Ser Gln Gln Leu Phe Gln 100 105 110 Arg Tyr Lys Gln Leu Ala Arg Val Thr Glu Leu Ile His Ala Ala Asn 115 120 125 Ile Ile His Ile Asn Ile Gly Glu Glu Gln Ser Asn Glu Gln Ile Lys 130 135 140 Leu Ala Thr Leu Val Gly Asp Tyr Leu Leu Gly Lys Ala Ser Val Asp 145 150 155 160 Leu Ala His Leu Glu Asn Asn Ala Ile Thr Glu Ile Met Ala Ser Val 165 170 175 Ile Ala Asn Leu Val Glu Gly His Phe Gly Ser Arg Gln Asn Gly Ser 180 185 190 Val Gly Leu Ser Asn Glu Arg Thr Ile Leu Leu Gln Ser Ala Phe Met 195 200 205 Pro Ala Lys Ala Cys Leu Cys Ala Ser Ile Leu Asn Asn Ser Ser Gln 210 215 220 Tyr Ile Asn Asp Ala Cys Phe Asn Tyr Gly Lys Phe Leu Gly Leu Ser 225 230 235 240 Leu Gln Leu Ala His Lys Pro Val Ser Pro Asp Ala Gln Val Leu Gln 245 250 255 Lys Asn Asn Asp Ile Leu Lys Thr Tyr Val Glu Asn Ala Lys Ser Ser 260 265 270 Leu Ser Val Phe Pro Asp Ile Glu Ala Lys Gln Ala Leu Met Glu Ile 275 280 285 Ala Asn Ser Val Ser Lys 290 3 1200 DNA human 3 atg aac ttt cgg cag ctg ctg ttg cac ttg cca cgt tat ctt gga gcc 48 Met Asn Phe Arg Gln Leu Leu Leu His Leu Pro Arg Tyr Leu Gly Ala 1 5 10 15 tcg ggt tcc ccg cgt cgc ctg tgg tgg tcc ccg tcc ctc gac acc atc 96 Ser Gly Ser Pro Arg Arg Leu Trp Trp Ser Pro Ser Leu Asp Thr Ile 20 25 30 tcc tcg gtg ggc tct tgg cgt ggt cgg tcc tcc aag tcc ccg gcc cac 144 Ser Ser Val Gly Ser Trp Arg Gly Arg Ser Ser Lys Ser Pro Ala His 35 40 45 tgg aat cag gta gtg tca gag gcg gag aag atc gtg ggg tac ccc acg 192 Trp Asn Gln Val Val Ser Glu Ala Glu Lys Ile Val Gly Tyr Pro Thr 50 55 60 tcc ttc atg agc ctt cgc tgc ctg ctg agc gac gag ctc agc aac atc 240 Ser Phe Met Ser Leu Arg Cys Leu Leu Ser Asp Glu Leu Ser Asn Ile 65 70 75 80 gct atg cag gtg cgg aag ctg gtg ggc act cag cac cct ctg ctt acc 288 Ala Met Gln Val Arg Lys Leu Val Gly Thr Gln His Pro Leu Leu Thr 85 90 95 aca gcc agg ggg ctt gta cat gac agc tgg aat agc ctc cag ttg agg 336 Thr Ala Arg Gly Leu Val His Asp Ser Trp Asn Ser Leu Gln Leu Arg 100 105 110 ggc ttg gtg gtg ctc ctt atc tct aaa gca gct ggg ccc agc agc gtg 384 Gly Leu Val Val Leu Leu Ile Ser Lys Ala Ala Gly Pro Ser Ser Val 115 120 125 aac act tca tgt cag aac tat gac atg gtc agt ggg atc tac tca tgt 432 Asn Thr Ser Cys Gln Asn Tyr Asp Met Val Ser Gly Ile Tyr Ser Cys 130 135 140 caa aga agt ttg gca gag atc acg gag cta att cat att gct ctc ctt 480 Gln Arg Ser Leu Ala Glu Ile Thr Glu Leu Ile His Ile Ala Leu Leu 145 150 155 160 gta cat cgt ggg ata gta aat tta aat gag ttg caa tca tct gat ggt 528 Val His Arg Gly Ile Val Asn Leu Asn Glu Leu Gln Ser Ser Asp Gly 165 170 175 cca ctg aaa gac atg caa ttt gga aat aaa att gct atc ctg agt gga 576 Pro Leu Lys Asp Met Gln Phe Gly Asn Lys Ile Ala Ile Leu Ser Gly 180 185 190 gac ttt ctt cta gca aat gcc tgc aat gga cta gct ctg cta cag aac 624 Asp Phe Leu Leu Ala Asn Ala Cys Asn Gly Leu Ala Leu Leu Gln Asn 195 200 205 acc aag gtt gtg gaa ctt tta gca agt gct ctt atg gac ttg gta caa 672 Thr Lys Val Val Glu Leu Leu Ala Ser Ala Leu Met Asp Leu Val Gln 210 215 220 gga gta tat cat gaa aat tct act tca aag gaa agt tat atc aca gat 720 Gly Val Tyr His Glu Asn Ser Thr Ser Lys Glu Ser Tyr Ile Thr Asp 225 230 235 240 gat att gga ata tcg act tgg aag gag cag act ttt ctc tcc cat ggt 768 Asp Ile Gly Ile Ser Thr Trp Lys Glu Gln Thr Phe Leu Ser His Gly 245 250 255 gcc tta cta gca aag agc tgc caa gct gca atg gaa tta gca aag cat 816 Ala Leu Leu Ala Lys Ser Cys Gln Ala Ala Met Glu Leu Ala Lys His 260 265 270 gat gct gag gtt cag aat atg gca ttt cag tat ggg aag cac atg gcc 864 Asp Ala Glu Val Gln Asn Met Ala Phe Gln Tyr Gly Lys His Met Ala 275 280 285 atg agt cat aag ata aat tct gat gtc cag cct ttt att aaa gaa aag 912 Met Ser His Lys Ile Asn Ser Asp Val Gln Pro Phe Ile Lys Glu Lys 290 295 300 acc agt gac tcc atg act ttt aat cta aac tca gct cct gta gtc tta 960 Thr Ser Asp Ser Met Thr Phe Asn Leu Asn Ser Ala Pro Val Val Leu 305 310 315 320 cat cag gaa ttt ctt gga aga gat ttg tgg att aaa cag atc gga gag 1008 His Gln Glu Phe Leu Gly Arg Asp Leu Trp Ile Lys Gln Ile Gly Glu 325 330 335 gct caa gaa aaa gga aga ttg gac tat gct aag ttg cga gaa aga atc 1056 Ala Gln Glu Lys Gly Arg Leu Asp Tyr Ala Lys Leu Arg Glu Arg Ile 340 345 350 aaa gct ggc aaa ggt gtg act tca gct att gac ctg tgt cgt tac cat 1104 Lys Ala Gly Lys Gly Val Thr Ser Ala Ile Asp Leu Cys Arg Tyr His 355 360 365 gga aac aag gca ctg gag gcc ctg gag agc ttt cct ccc tcg gag gcc 1152 Gly Asn Lys Ala Leu Glu Ala Leu Glu Ser Phe Pro Pro Ser Glu Ala 370 375 380 aga tct gct tta gaa aac att gtg ttt gct gtg acc aga ttt tca tga 1200 Arg Ser Ala Leu Glu Asn Ile Val Phe Ala Val Thr Arg Phe Ser *** 385 390 395 4 399 PRT human 4 Met Asn Phe Arg Gln Leu Leu Leu His Leu Pro Arg Tyr Leu Gly Ala 1 5 10 15 Ser Gly Ser Pro Arg Arg Leu Trp Trp Ser Pro Ser Leu Asp Thr Ile 20 25 30 Ser Ser Val Gly Ser Trp Arg Gly Arg Ser Ser Lys Ser Pro Ala His 35 40 45 Trp Asn Gln Val Val Ser Glu Ala Glu Lys Ile Val Gly Tyr Pro Thr 50 55 60 Ser Phe Met Ser Leu Arg Cys Leu Leu Ser Asp Glu Leu Ser Asn Ile 65 70 75 80 Ala Met Gln Val Arg Lys Leu Val Gly Thr Gln His Pro Leu Leu Thr 85 90 95 Thr Ala Arg Gly Leu Val His Asp Ser Trp Asn Ser Leu Gln Leu Arg 100 105 110 Gly Leu Val Val Leu Leu Ile Ser Lys Ala Ala Gly Pro Ser Ser Val 115 120 125 Asn Thr Ser Cys Gln Asn Tyr Asp Met Val Ser Gly Ile Tyr Ser Cys 130 135 140 Gln Arg Ser Leu Ala Glu Ile Thr Glu Leu Ile His Ile Ala Leu Leu 145 150 155 160 Val His Arg Gly Ile Val Asn Leu Asn Glu Leu Gln Ser Ser Asp Gly 165 170 175 Pro Leu Lys Asp Met Gln Phe Gly Asn Lys Ile Ala Ile Leu Ser Gly 180 185 190 Asp Phe Leu Leu Ala Asn Ala Cys Asn Gly Leu Ala Leu Leu Gln Asn 195 200 205 Thr Lys Val Val Glu Leu Leu Ala Ser Ala Leu Met Asp Leu Val Gln 210 215 220 Gly Val Tyr His Glu Asn Ser Thr Ser Lys Glu Ser Tyr Ile Thr Asp 225 230 235 240 Asp Ile Gly Ile Ser Thr Trp Lys Glu Gln Thr Phe Leu Ser His Gly 245 250 255 Ala Leu Leu Ala Lys Ser Cys Gln Ala Ala Met Glu Leu Ala Lys His 260 265 270 Asp Ala Glu Val Gln Asn Met Ala Phe Gln Tyr Gly Lys His Met Ala 275 280 285 Met Ser His Lys Ile Asn Ser Asp Val Gln Pro Phe Ile Lys Glu Lys 290 295 300 Thr Ser Asp Ser Met Thr Phe Asn Leu Asn Ser Ala Pro Val Val Leu 305 310 315 320 His Gln Glu Phe Leu Gly Arg Asp Leu Trp Ile Lys Gln Ile Gly Glu 325 330 335 Ala Gln Glu Lys Gly Arg Leu Asp Tyr Ala Lys Leu Arg Glu Arg Ile 340 345 350 Lys Ala Gly Lys Gly Val Thr Ser Ala Ile Asp Leu Cys Arg Tyr His 355 360 365 Gly Asn Lys Ala Leu Glu Ala Leu Glu Ser Phe Pro Pro Ser Glu Ala 370 375 380 Arg Ser Ala Leu Glu Asn Ile Val Phe Ala Val Thr Arg Phe Ser 385 390 395 5 1206 DNA mouse 5 atg agc ctc cgg cag ctg ctg ttg cgc ttg tcc ggt tac ctc ggg gct 48 Met Ser Leu Arg Gln Leu Leu Leu Arg Leu Ser Gly Tyr Leu Gly Ala 1 5 10 15 tct ggt ccc ccc agt cgc cac tgg tgg tac ttc aga tcc ctc gac agc 96 Ser Gly Pro Pro Ser Arg His Trp Trp Tyr Phe Arg Ser Leu Asp Ser 20 25 30 atc tcc tcg gcg ggc tcc tgg cgc ggg cgc tcc tcc agg tca ccg gcc 144 Ile Ser Ser Ala Gly Ser Trp Arg Gly Arg Ser Ser Arg Ser Pro Ala 35 40 45 cat tgg aac caa gtg gtg tcc gag gcg gag aag atc gtg ggc tac ccc 192 His Trp Asn Gln Val Val Ser Glu Ala Glu Lys Ile Val Gly Tyr Pro 50 55 60 gca tcc ttc atg agc ctg cgc tgc ctg ctg agc gac gag ctc agc aat 240 Ala Ser Phe Met Ser Leu Arg Cys Leu Leu Ser Asp Glu Leu Ser Asn 65 70 75 80 atc gcc atg cag gtg cgg aag ctg gtg ggg acg gga cac cct ctg ctt 288 Ile Ala Met Gln Val Arg Lys Leu Val Gly Thr Gly His Pro Leu Leu 85 90 95 acc act gcc agg gcc ctc gtg cac gac agc cgg cat aac cta caa ctg 336 Thr Thr Ala Arg Ala Leu Val His Asp Ser Arg His Asn Leu Gln Leu 100 105 110 cgg ggc ctg gtc gtg ctc ctc ata tca aag gct gcg ggg ccc agc act 384 Arg Gly Leu Val Val Leu Leu Ile Ser Lys Ala Ala Gly Pro Ser Thr 115 120 125 cgg aac gct tcg tgt cag aac tac gac atg gtc agt ggg gta tac tca 432 Arg Asn Ala Ser Cys Gln Asn Tyr Asp Met Val Ser Gly Val Tyr Ser 130 135 140 tgt caa aga agt ttg gca gag atc aca gaa ctt atc cat act gct ctc 480 Cys Gln Arg Ser Leu Ala Glu Ile Thr Glu Leu Ile His Thr Ala Leu 145 150 155 160 ctg gtg cat cgt ggg ata gta aac tta agt gaa tta cag tca tct gat 528 Leu Val His Arg Gly Ile Val Asn Leu Ser Glu Leu Gln Ser Ser Asp 165 170 175 gga cca ctg aaa gac atg cag ttt gga aac aaa ata gct atc ctg agt 576 Gly Pro Leu Lys Asp Met Gln Phe Gly Asn Lys Ile Ala Ile Leu Ser 180 185 190 gga gac ttt ctt cta gca aat gca tgc aat gga cta gct ctt cta cag 624 Gly Asp Phe Leu Leu Ala Asn Ala Cys Asn Gly Leu Ala Leu Leu Gln 195 200 205 aac acc aag gtt gtg gag ctt tta tca agt gct ctt atg gac ttg gtg 672 Asn Thr Lys Val Val Glu Leu Leu Ser Ser Ala Leu Met Asp Leu Val 210 215 220 cat gga gta tac cag gag aac tct gct tcc acc aag gaa aat tct atc 720 His Gly Val Tyr Gln Glu Asn Ser Ala Ser Thr Lys Glu Asn Ser Ile 225 230 235 240 cca gat gat att gga atc tcg acc tgg aag gag cag act ttc ctg tcc 768 Pro Asp Asp Ile Gly Ile Ser Thr Trp Lys Glu Gln Thr Phe Leu Ser 245 250 255 cat tgt gcc ttg cta gcg aag agc tgc cag gct gca atg gag tta gca 816 His Cys Ala Leu Leu Ala Lys Ser Cys Gln Ala Ala Met Glu Leu Ala 260 265 270 aag cat gat gct gcg gtc caa gac atg gca ttc cag tat ggg aag cac 864 Lys His Asp Ala Ala Val Gln Asp Met Ala Phe Gln Tyr Gly Lys His 275 280 285 atg gcc atg agt cac aag atc aat gct gac ctc cag cct ttt att aaa 912 Met Ala Met Ser His Lys Ile Asn Ala Asp Leu Gln Pro Phe Ile Lys 290 295 300 gac aag gcc agt gac tct aag act ttt aac cta aac tca gca cct gta 960 Asp Lys Ala Ser Asp Ser Lys Thr Phe Asn Leu Asn Ser Ala Pro Val 305 310 315 320 gtc tta cat cag gag ttt ctt gga aga gat ttg tgg att aag cag att 1008 Val Leu His Gln Glu Phe Leu Gly Arg Asp Leu Trp Ile Lys Gln Ile 325 330 335 gga gag gct caa gag aaa gga agc ttg aac tac agt aag ttg cga gaa 1056 Gly Glu Ala Gln Glu Lys Gly Ser Leu Asn Tyr Ser Lys Leu Arg Glu 340 345 350 aca atc aaa gct ggc aaa ggt gtg act tca gct att gac ctg tgt cgt 1104 Thr Ile Lys Ala Gly Lys Gly Val Thr Ser Ala Ile Asp Leu Cys Arg 355 360 365 tac cat gga aac aag gca cta gag gcc ctg gag agc ttc cct ccc tca 1152 Tyr His Gly Asn Lys Ala Leu Glu Ala Leu Glu Ser Phe Pro Pro Ser 370 375 380 gag gcc aga tcg gct tta gaa aac att gtg ttt gct gtg acc aga ttt 1200 Glu Ala Arg Ser Ala Leu Glu Asn Ile Val Phe Ala Val Thr Arg Phe 385 390 395 400 tct tga 1206 Ser 6 401 PRT mouse 6 Met Ser Leu Arg Gln Leu Leu Leu Arg Leu Ser Gly Tyr Leu Gly Ala 1 5 10 15 Ser Gly Pro Pro Ser Arg His Trp Trp Tyr Phe Arg Ser Leu Asp Ser 20 25 30 Ile Ser Ser Ala Gly Ser Trp Arg Gly Arg Ser Ser Arg Ser Pro Ala 35 40 45 His Trp Asn Gln Val Val Ser Glu Ala Glu Lys Ile Val Gly Tyr Pro 50 55 60 Ala Ser Phe Met Ser Leu Arg Cys Leu Leu Ser Asp Glu Leu Ser Asn 65 70 75 80 Ile Ala Met Gln Val Arg Lys Leu Val Gly Thr Gly His Pro Leu Leu 85 90 95 Thr Thr Ala Arg Ala Leu Val His Asp Ser Arg His Asn Leu Gln Leu 100 105 110 Arg Gly Leu Val Val Leu Leu Ile Ser Lys Ala Ala Gly Pro Ser Thr 115 120 125 Arg Asn Ala Ser Cys Gln Asn Tyr Asp Met Val Ser Gly Val Tyr Ser 130 135 140 Cys Gln Arg Ser Leu Ala Glu Ile Thr Glu Leu Ile His Thr Ala Leu 145 150 155 160 Leu Val His Arg Gly Ile Val Asn Leu Ser Glu Leu Gln Ser Ser Asp 165 170 175 Gly Pro Leu Lys Asp Met Gln Phe Gly Asn Lys Ile Ala Ile Leu Ser 180 185 190 Gly Asp Phe Leu Leu Ala Asn Ala Cys Asn Gly Leu Ala Leu Leu Gln 195 200 205 Asn Thr Lys Val Val Glu Leu Leu Ser Ser Ala Leu Met Asp Leu Val 210 215 220 His Gly Val Tyr Gln Glu Asn Ser Ala Ser Thr Lys Glu Asn Ser Ile 225 230 235 240 Pro Asp Asp Ile Gly Ile Ser Thr Trp Lys Glu Gln Thr Phe Leu Ser 245 250 255 His Cys Ala Leu Leu Ala Lys Ser Cys Gln Ala Ala Met Glu Leu Ala 260 265 270 Lys His Asp Ala Ala Val Gln Asp Met Ala Phe Gln Tyr Gly Lys His 275 280 285 Met Ala Met Ser His Lys Ile Asn Ala Asp Leu Gln Pro Phe Ile Lys 290 295 300 Asp Lys Ala Ser Asp Ser Lys Thr Phe Asn Leu Asn Ser Ala Pro Val 305 310 315 320 Val Leu His Gln Glu Phe Leu Gly Arg Asp Leu Trp Ile Lys Gln Ile 325 330 335 Gly Glu Ala Gln Glu Lys Gly Ser Leu Asn Tyr Ser Lys Leu Arg Glu 340 345 350 Thr Ile Lys Ala Gly Lys Gly Val Thr Ser Ala Ile Asp Leu Cys Arg 355 360 365 Tyr His Gly Asn Lys Ala Leu Glu Ala Leu Glu Ser Phe Pro Pro Ser 370 375 380 Glu Ala Arg Ser Ala Leu Glu Asn Ile Val Phe Ala Val Thr Arg Phe 385 390 395 400 Ser 7 24 DNA Artificial Sequence Description of Artificial Sequence primer N-dlp1 7 tcgaattcga tgagctttcc gttc 24 8 16 DNA Artificial Sequence Description of Artificial Sequence primer C-dlp1 8 catggatatc gcattc 16 9 30 DNA Artificial Sequence Description of Artificial Sequence primer h DLP1-N 9 ctggatccat gaactttcgg cagctgctgt 30 10 29 DNA Artificial Sequence Description of Artificial Sequence primer h DLP1-C 10 ttcccgggtc atgaaaatct ggtcacagc 29 11 30 DNA Artificial Sequence Description of Artificial Sequence primer m DLP1-N 11 gcgtcgacga attctatgag cctccggcag 30 12 29 DNA Artificial Sequence Description of Artificial Sequence primer m DLP1-C 12 ccggatcctc aagaaaatct ggtcacagc 29 13 24 DNA Artificial Sequence Description of Artificial Sequence primer N-dps 13 tcctgcagca tgattcagta tgta 24 14 26 DNA Artificial Sequence Description of Artificial Sequence primer C-dps 14 tcgtcgactc acttctttct cgttat 26 15 32 DNA Artificial Sequence Description of Artificial Sequence primer h DPS1-N 15 aagtcgacaa tggcctcgcg ctggtggcgg tg 32 16 36 DNA Artificial Sequence Description of Artificial Sequence primer h DPS1-C 16 ggcggatcct catttatctc ttgtgagtac aatttc 36 17 30 DNA Artificial Sequence Description of Artificial Sequence primer mSDS-N 17 gccatatggc gaattcgatg cgctggtcgt 30 18 24 DNA Artificial Sequence Description of Artificial Sequence primer mSDS-C 18 gcgtcgactc atttatctct ggtg 24 

1. A DNA defined below under (a), (b) or (c): (a) a DNA having a base sequence shown under SEQ ID NO:1, 3 or 5 and coding for a protein enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism; (b) a DNA having a base sequence derived from the base sequence shown under SEQ ID NO:1, 3 or 5 by deletion, addition, insertion and/or substitution of one to several bases thereof and coding for a protein enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism; (c) a DNA capable of hybridizing with a DNA comprising the base sequence shown under SEQ ID NO:1, 3 or 5 under a stringent condition and coding for a protein enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism.
 2. A protein defined below under (d) or (e): (d) a protein having an amino acid sequence shown under SEQ ID NO:2, 4 or 6 and enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism; (e) a protein having an amino acid sequence derived from the amino acid sequence shown under SEQ ID NO:2, 4 or 6 by deletion, addition, insertion and/or substitution of one to several amino acid residues and enabling or enhancing the activity expression of a eukaryote-derived long-chain prenyl diphosphate synthase in a host microorganism.
 3. A DNA coding for the protein according to claim
 2. 4. An expression vector resulting from insertion of the DNA according to claim 1 or 3 into a vector for expression.
 5. The expression vector according to claim 4, wherein the vector for expression is pSTV28.
 6. The expression vector according to claim 5, which is pSTVDLP1.
 7. The expression vector according to claim 5, which is pSTVK28-mDLP1.
 8. The expression vector according to claim 5, which is pSTVK28-hDLP1.
 9. A transformant resulting from transformation of a host microorganism with the DNA according to claim 1 or
 3. 10. A transformant resulting from transformation of a host microorganism with the expression vector according to claim 4, 5, 6, 7 or
 8. 11. The transformant according to claim 9 or 10, wherein the host microorganism is Escherichia coli.
 12. The transformant according to claim 11, which is E. coli DH5α(pSTVDLP1) (FERM BP-7433).
 13. The transformant according to claim 11, which is E. coli DH5α(pSTVK28-mDLP1).
 14. The transformant according to claim 11, which is E. coli DH5α(pSTVK28-hDLP1).
 15. The transformant according to claim 9, 10, 11, 12, 13 or 14, which harbors a eukaryote-derived long-chain prenyl diphosphate synthase gene further introduced therein.
 16. The transformant according to claim 15, wherein the eukaryote-derived prenyl diphosphate synthase gene is a gene derived from a microorganism belong to the genus Schizosaccharomyces, Saitoella, Rhodotorula, Leucosporidium, Asperugillus or Bulleomyces, a human-derived gene or a mouse-derived gene.
 17. The transformant according to claim 15, which is E. coli DH5α(pSTVDLP1, pBSDPS) (FERM BP-7548).
 18. The transformant according to claim 15, which is E. coli DH5α(pSTVDLP1, pUhDPS1) (FERM BP-8025).
 19. The transformant according to claim 15, which is E. coli DH5α(pSTVDLP1, pBmSDS1).
 20. The transformant according to claim 15, which is E. coli DH5α(pSTVK28-mDLP1, pUhDPS1).
 21. The transformant according to claim 15, which is E. coli DH5α(pSTVK28-mDLP1, pBmSDS1) (FERM BP-8027).
 22. The transformant according to claim 15, which is E. coli DH5α(pSTVK28-hDLP1, pUhDPS1) (FERM BP-8026).
 23. The transformant according to claim 15, which is E. coli DH5α(pSTVK28-hDLP1, pBmSDS1).
 24. A method of producing coenzymes Q, which comprises cultivating the transformant according to any one of claims 15 to 23 in a medium to cause formation and accumulation of a coenzyme Q in the culture and recovering the same. 